[1] P. Würfel, Physics of Solar Cells (Wiley-VCH, Weinheim, 2005).

[2] P. Würfel, S. Finkbeiner, and E. Daub, Appl. Phys. A 60, 67 (1995).

[3] M. A. Green, J. Zhao, A. Wang, P. J. Reece, and M. Gal, Nature 412, 805 (2001).

[4] T. Trupke, J. Zhao, A. Wang, R. Corkish, and M. A. Green, Appl. Phys. Lett. 82, 2996 (2003).

[5] H. A. Weakliem and D. Redfield, J. Appl. Phys. 50, 1491 (1979).

[6] T. Trupke, R. A. Bardos, F. Hudert, P. Würfel, J. Zhao, A. Wang, and M. A. Green, in Proceedings of 19th European Photovoltaic SOlar Energy Conference (2004).

[7] P. Würfel, T. Trupke, T. Puzzer, E. Schaffer, W. Warta, and S. W. Glunz, J. Appl. Phys. 101, 123110 (2007).